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The angular speed of a propeller on a boat increases with constantacceleration from 10.9 rad/s to 24.0 rad/s in 2.20 revolutions. What is the acceleration of the propeller?
A sample has a activity of 0.0021 Bq per gram of carbon. Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
If the sprinter from the previous problem accelerates at that rate for 20 m, what will be his time for the race
The tires of a car make 55 revolutions as the car reduces its speed uniformly from 86km/h to 50km/h . The tires have a diameter of 0.90m. how much more time is required for it to stop
The potential difference between the surface of a 2.2cm -diameter power line and a point 1.3m distant is 3.7kV. What is the line charge density on the power line
A motorcycle is traveling up one side of a hill and down the other side. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road
You and a friend are studying late at night. There are three 150 W light bulbs and a radio with an internal resistance of 79.0, How much electrical power are you using
An electron microscope operates with electrons of kinetic energy 40keV. What is the wavelength of these electrons? (h= 6.626 x 10^-34 J/s, 1eV= 1.6 x 10^-19 J, and me= 9.1 x 10^-31kg)
Two equally charged particles, held 3.4 × 10-3 m apart, are released from rest, what are the mass of the second particle and, the magnitude of the charge of each particle
In a mass spectrometer the charged particles have to reach a common specific speed. To do so, they are accelerated with an electric field, determine the direction of the magnetic force
A uniform spherical shell of mass M = 13.0 kg and radius R = 0.390 m can rotate about a vertical axis on frictionless bearings (see the figure). A massless cord passes around the equator of the shell, over a pulley of rotational inertia I = 0.200 ..
A pen contains a spring with a spring constant of 251 N/m. How much work is done by the spring force to ready the pen for writing
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